Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 878 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sugar (d) salt
3. 3.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the flowers (c) the fruits (d) the roots
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) False (b) True
5. 5.True or false: tamarind water is an acid. (a) True (b) False
6. 6.True or false: cooking oil does not dissolve in water. (a) False (b) True
7. 7.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) folding paper (c) rusting iron (d) milk turning to curd
8. 8.True or false: sugar is needed for a seed to sprout. (a) True (b) False
9. 9.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the iron setting is the one thing we change. (a) True (b) False
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) put it in your mouth (d) keep it away from eyes
11. 11.🧺 Do we need cotton or cloth for the muddy water filter? (a) needed (b) not needed
12. 12.🧈 What is the watery liquid left after the butter forms? (a) honey (b) oil (c) buttermilk (d) vinegar
13. 13.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a battery cell (d) lemon juice
14. 14.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) very little fizzing (c) the balloon bursts (d) it turns to honey
15. 15.🧺 Which of these is not needed for making butter? (a) fresh cream (b) a balloon (c) a bowl (d) cold water to rinse
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) an old shirt or apron (d) your school uniform
18. 18.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it turns blue (c) it grows bigger (d) it shrinks
19. 19.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) vinegar (d) soap solution
20. 20.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🍞 Which of these is something yeast needs? (a) warm water (b) a magnet (c) vinegar (d) sunlight
22. 22.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
23. 23.True or false: small stones from dal is done by winnowing. (a) True (b) False
24. 24.📘 The browning of lemon juice with heat is a ___ change. (a) magnetic (b) physical (c) musical (d) chemical
25. 25.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
26. 26.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) how dark the writing is (c) the iron setting (d) the same paper
27. 27.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
28. 28.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a balloon (c) a comb (d) a funnel or spoon
29. 29.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) moong seeds (b) a few days (c) turmeric powder (d) water
30. 30.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) leaves pass through (b) leaves stay behind (c) tea stays behind (d) both stay behind
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it disappears (d) it turns yellow again
33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) a dropper or spoon (c) white paper strips (d) soap solution
34. 34.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
35. 35.🍋 Secret message: who does this step — plugging in the iron? (a) an adult does it (b) a child can do it
36. 36.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
37. 37.🔍 Which is the odd one out? (a) baking a cake (b) melting ice (c) freezing water (d) dissolving salt
38. 38.🧺 Do we need a few hours for the leafy bag test? (a) needed (b) not needed
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the same bottle is the one thing we change. (a) False (b) True
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of sugar

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